CVE-2026-81355: CWE-122: Heap-based Buffer Overflow in Microsoft Windows 10 Version 1607
Description
Heap-based buffer overflow in Virtual Hard Disk (VHD) Miniport Driver allows an authorized attacker to execute code locally.
CVSS v3.1
Score 7.5high
Affected software
Microsoft
Windows 10 Version 1607
Microsoft
Windows 10 Version 1809
Microsoft
Windows 10 Version 21H2
Microsoft
Windows 10 Version 22H2
Microsoft
Windows 11 version 23H2
Microsoft
Windows 11 Version 23H2
Microsoft
Windows 11 Version 24H2
Microsoft
Windows 11 Version 25H2
Microsoft
Windows 11 version 26H1
Microsoft
Windows Server 2012
Microsoft
Windows Server 2012 (Server Core installation)
Microsoft
Windows Server 2012 R2
Microsoft
Windows Server 2012 R2 (Server Core installation)
Microsoft
Windows Server 2016
Microsoft
Windows Server 2016 (Server Core installation)
Microsoft
Windows Server 2019
Microsoft
Windows Server 2019 (Server Core installation)
Microsoft
Windows Server 2022
Microsoft
Windows Server 2025
Microsoft
Windows Server 2025 (Server Core installation)
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-81355) involves a heap-based buffer overflow in the VHD Miniport Driver component of Microsoft Windows 10 Version 1607 and other specified builds. Exploitation requires local access with high privileges and does not require user interaction. Successful exploitation can result in complete confidentiality, integrity, and availability impact, including arbitrary code execution. Microsoft has published an official fix for this vulnerability.
Potential Impact
An authorized attacker with high privileges can exploit this vulnerability to execute arbitrary code locally, potentially leading to full system compromise including confidentiality, integrity, and availability impacts. The vulnerability affects multiple Windows 10 builds and related versions as specified. There are no known exploits in the wild at this time.
Mitigation Recommendations
Microsoft has released an official fix for this vulnerability. It is recommended to apply the security updates provided by Microsoft as detailed in their advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-81355. No additional mitigation steps are indicated beyond applying the official patch.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-08-26T18:40:19.856Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-81355","vendor":"Microsoft"}]
Threat ID: 6aa0456aacd9273b49face56
Added to database: 09/08/2026, 17:27:06 UTC
Last enriched: 10/14/2026, 22:06:07 UTC
Last updated: 10/22/2026, 01:15:26 UTC
Views: 26
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